Results 231 to 240 of about 106,138 (262)
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Density-wave-modulated crystallization in nanoscale silicon films and droplets
The Journal of Chemical Physics, 2016Free surfaces have been known to significantly influence the crystallization of tetrahedral liquids. However, a comprehensive understanding of the influence mechanism is still lacking at present. By employing molecular dynamics simulations, we find that the nucleation probability in nanoscale silicon films and droplets exhibits a ripple-like ...
Yongjun Lü, Qingling Bi, Xinqing Yan
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Laserdeposition of YBa2Cu3O7 films with low droplet densities
1992Pulsed laser deposition is a very successful method of preparing thin films of high-temperature superconductors with optimum electrical properties. For multilayer systems in superconductor electronics very smooth surfaces are required. In order to achieve such films that are free of pinholes, droplets and outgrowths, the surface morphology on (100) MgO
M. Schilling, F. Goerke, U. Merkt
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The one-body density matrix in Helium droplets
Journal of Low Temperature Physics, 1993The growth of the Bose condensate in Helium droplets is studied through variational Monte Carlo calculations of the one-body density matrix. Both the off-diagonal and the l=0 component of the one-body density matrix show unmistakable finite range ordering within the core of the droplet.
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On-chip high density droplet-on-template (DOT) array
Journal of Micromechanics and Microengineering, 2014In this report, we present a new method for generating a high-density (2D) droplet array using double-layered polydimethylsiloxane (PDMS) templates containing honeycomb microwells. Without external flow control, a droplet-on-template (DOT) was created by utilizing capillary forces associated with the interfacial tension between the aqueous and oil ...
Jitae Kim, Simon Song
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Supercritical density relaxation as a new approach of droplet vaporization
Physics of Fluids, 2004The isobaric density relaxation of a cold, slightly supercritical, fluid package in a hotter atmosphere of this same fluid at a near critical pressure is studied in this paper. We solve the Navier–Stokes equations describing the evolution of an initial density inhomogeneity in a supercritical van der Waals fluid.
Préau, Stéphane +3 more
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Effects of turbulence and number density on the drag coefficient of droplets
29th Aerospace Sciences Meeting, 1991Droplet drag coefficients for polydispersed drops are determined via the behavior of drops decelerating on the stagnation streamline of a cylinder with an afterbody mounted in a wind tunnel test section. A variety of velocity, turbulence levels, and droplet number densities were studied.
R. RUDOFF, D. KAMEMOTO, W. BACHALO
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Influence of Droplet Size and Density on Phytotoxicity of Three Herbicides
Weed Technology, 1992The effects of droplet size and numerical deposit density on herbicide efficacy differed among investigations that relied on commercial nozzles to produce droplets strictly within small, medium, or large sizes. A droplet generator capable of producing uniform and homogeneous droplets was therefore used in a greenhouse experiment.
Raj Prasad, Beresford L. Cadogan
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The sedimenting-droplet procedure for measuring fluid densitles
Analytical Biochemistry, 1980Abstract An apparatus is described which is used for the determination of velocities of falling droplets of small volumes (5 μl) through hydrophobic mixtures. From calibration curves with sodium chloride solutions of different molarities and specific gravities, the densities of the fluid in the droplets were obtained by interpolation.
A, Polson, H, Alk, K, Achtleitner
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Journal of Environmental Science and Health, Part B, 2010
The most important factor affecting efficacy and drift of pesticide applications is the droplet spectrum. To measure pesticide drift, researchers utilize fluorescent tracers to rapidly quantify spray deposition. Although fluorescent tracers have been used for more than 50 years, no experiments have been performed on the effect they have on the ...
Jerome J, Schleier +2 more
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The most important factor affecting efficacy and drift of pesticide applications is the droplet spectrum. To measure pesticide drift, researchers utilize fluorescent tracers to rapidly quantify spray deposition. Although fluorescent tracers have been used for more than 50 years, no experiments have been performed on the effect they have on the ...
Jerome J, Schleier +2 more
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Impact of density ratio on droplet dynamics in pulsating flow
Physics of FluidsSecondary atomization is extensively studied by investigating a droplet subjected to a steady air/gas stream. However, droplets are often subjected to unsteady or pulsating flows, such as in aero-engines or rockets, because of thermo-acoustic instabilities in the combustion chambers.
Robin Kumar, Sudipto Mukhopadhyay
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